Monarch Butterflies Are Now Endangered. Here’s Where to See Them Near San Francisco
Insects are like the canaries in the coal mine in regards to how we can assess the health of ecosystems. When these invertebrates are in healthy, balanced numbers, it’s a sign that said environment is chugging along nicely; conversely, if their numbers are declining rapidly or are ballooning uncontrolled, something’s out of whack.
And something is indeed not right with the migratory monarch butterfly as its population counts continue their downward trend. It’s why the species was declared “endangered” back in July by the International Union for the Conservation of Nature (IUCN), the global leading authority on the status of biological diversity.
Why? Well, populations of the butterfly— which is famous for its twice-yearly, 2,500-mile journey across the continent between its summer and wi...




